Spatial, temporal and diel variations of fish assemblages at two sandy beaches in the Sepetiba Bay, Rio de Janeiro, Brazil

2003 ◽  
Vol 57 (5-6) ◽  
pp. 817-828 ◽  
Author(s):  
André Luiz Machado Pessanha ◽  
Francisco Gerson Araújo
Keyword(s):  
Rio De Janeiro ◽  
Fish Assemblages ◽  
Sandy Beaches ◽  
Sepetiba Bay ◽  
Diel Variations

scholarly journals Crustaceans composition in sandy beaches of Sepetiba Bay, Rio de Janeiro, Brazil

Check List ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 778 ◽  
Author(s):  
Ricardo S. Cardoso ◽  
Felipe Meireis ◽  
Gustavo Mattos
Keyword(s):  
Spatial Distribution ◽  
Rio De Janeiro ◽  
Sandy Beaches ◽  
Southeastern Brazil ◽  
Sepetiba Bay ◽  
Main Species ◽  
Janeiro State ◽  
Made In

A crustacean survey was made in Sepetiba bay, Rio de Janeiro state, southeastern Brazil. Twelve sandy beaches were sampled on five islands in this embayment. A total of 3024 individuals were collected, belonging to 21 species, which are grouped in 16 families, seven infraorders, seven suborders, and four orders. Isopods, followed by amphipods and tanaids, showed the highest abundance, amounting to over 92% of the dominance of crustaceans. The main species were Excirolana armata, Excirolana braziliensis (isopods), Atlantorchestoidea brasiliensis (amphipod), and Monokalliapseudes schubarti (tanaid), which together accounted about 80% of crustaceans of the beaches studied. Excirolana braziliensis had the highest frequency. The majority of species found are typical of sandy beaches, with large spatial distribution.

scholarly journals RELATIVE SEA LEVEL RISE EFFECTS AT THE MARAMBAIA BARRIER ISLAND AND GUARATIBA MANGROVE: SEPETIBA BAY (SE BRAZIL)

2019 ◽  
Vol 4 (3) ◽  
pp. 249-262
Author(s):  
Carolina Santana da Costa Santos ◽  
Fábio Ferreira Dias ◽  
Barbara Franz ◽  
Paulo Roberto Alves dos Santos ◽  
Thalita Da Fonseca Rodrigues ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Rio De Janeiro ◽  
Central Area ◽  
Barrier Island ◽  
Aerial Images ◽  
Relative Sea Level ◽  
Sepetiba Bay ◽  
Se Brazil ◽  
Relative Sea Level Rise

Human activities change coastal ecosystems, but they are also altered by natural causes, such as the relative sea level rise. This work analyzes the influence of changes of the relative sea level at Guaratiba mangrove and Marambaia barrier island, in Sepetiba Bay, Rio de Janeiro State (SE, Brazil), based on photo interpretation. The objective of this study is to analyze the morphodynamics of Marambaia coastal sand barrier, estimating the rate of the shoreline change by mapping the vegetation line position, variations of dune extension and overwash processes. The Marambaia barrier island and Guaratiba mangrove are highly vulnerable to sea level rise. The mangrove is suffering pressure from the relative sea level rising and urbanization. The mangrove migration towards the continent is evident through the analyses of aerial images from 1976 to 2005. If the current erosion process continues in the Marambaia barrier island, a disruption in the central area of the sand bank should occur, which will create a new communication between Sepetiba Bay and the ocean. This break will change the present internal circulation of the bay and modify the ecosystems. Also considering the anthropic pressure, if the Marambaia barrier island breaks, the mangrove area will be reduced or disappear. The sea level rise and the sedimentation rate lowering will result in the migration and marine transgression in Marambaia barrier island and Guaratiba mangrove. EFEITOS DO AUMENTO RELATIVO DO NÍVEL DO MAR NA ILHA BARREIRA DE MARAMBAIA E DO MANGUEZAL DE GUARATIBA: BAÍA DE SEPETIBA (SE BRASIL) ResumoAs atividades humanas alteram os ecossistemas costeiros, mas estes também são alterados por causas naturais, como por exemplo, o aumento relativo do nível do mar. Este trabalho analisa a influência das mudanças relativas do nível do mar no manguezal de Guaratiba e na ilha barreira de Marambaia, na Baía de Sepetiba, localizada no Estado do Rio de Janeiro (SE, Brasil), com base na fotointerpretação. O objetivo deste estudo é analisar a morfodinâmica da barreira costeira de areia de Marambaia, estimando a taxa de variação da linha de costa, mapeando a posição da linha de vegetação, variações da extensão dunar e os processos de overwash. A ilha barreira de Marambaia e o manguezal de Guaratiba são altamente vulneráveis à elevação do nível do mar. O manguezal está sofrendo pressão do aumento relativo do nível do mar e da urbanização. A migração do manguezal para o continente é evidente através da análise de imagens aéreas de 1976 a 2005. Se continuar o processo atual de erosão na ilha barreira de Marambaia, deverá ocorrer uma ruptura na área central do banco de areia, o que dará origem a uma nova comunicação entre a Baía de Sepetiba e a oceano. Essa quebra vai mudar a atual circulação interna da baía e modificar os ecossistemas. Se a ilha barreira de Marambaia se romper, a área de manguezal irá ser reduzida ou desaparecerá. Este efeito é tanto mais provável se for considerada também a pressão antrópica. A elevação do nível do mar e a redução da taxa de sedimentação resultarão na migração e transgressão marinha na barreira de Marambaia e no mangue de Guaratiba. Palavras-chave: Ilha da Barreira. Manguezal. Elevação do nível relativo do mar. Erosão costeira. Galgamento oceânico.

Environmental effects on the structure of polychaete feeding guilds on the beaches of Sepetiba Bay, south-eastern Brazil

2012 ◽  
Vol 93 (4) ◽  
pp. 973-980 ◽  
Author(s):  
Gustavo Mattos ◽  
Ricardo S. Cardoso ◽  
André Souza Dos Santos
Keyword(s):  
Grain Size ◽  
Sandy Beach ◽  
Sandy Beaches ◽  
Feeding Guilds ◽  
Feeding Guild ◽  
Beach Sediment ◽  
Sepetiba Bay ◽  
Importance Index ◽  
Eastern Brazil ◽  
Macrofauna Communities

Several studies have been conducted to explain patterns of the abundance, richness and diversity of sandy-beach macrofauna; however, such analyses have ignored the overall functional structure of macrofauna communities. Few studies have examined polychaete feeding guilds on sandy beach environments. To examine the effects of environmental factors on polychaete feeding guilds on sandy beaches, 12 sandy beaches from five islands in Sepetiba Bay were sampled. A total of 24 polychaete morphospecies, grouped among 21 families, were identified in these sandy beaches. The polychaete species were classified into 10 feeding guilds, and the SDT guild (suspended-deposit feeders, discretely motile, with tentacles) was the most abundant feeding guild, with 34.2% of total number of organisms. The highest trophic importance index and index of trophic diversity values were recorded on the sheltered beaches. A canonical correspondence analysis showed that the exposure rate, beach length, and grain size of the beach sediment significantly affected the polychaete feeding guild distribution and abundance. We can conclude that sheltered beaches have a higher diversity of feeding guilds than exposed beaches and that the biological descriptors of the feeding guilds are directly associated with the grain size of the sediment.

Habitat features not water variables explain most of fish assemblages use of sandy beaches in a Brazilian eutrophic bay

2018 ◽  
Vol 211 ◽  
pp. 100-109 ◽  
Author(s):  
Joice S. de Souza ◽  
Luciano N. dos Santos ◽  
Alejandra F.G.N. dos Santos
Keyword(s):  
Fish Assemblages ◽  
Sandy Beaches ◽  
Habitat Features

Benthic ciliates from Sepetiba Bay (Rio de Janeiro, Brazil) with description of Pseudokeronopsis sepetibensis n. sp. (Spirotrichea: Urostylida)

Zootaxa ◽  
2004 ◽  
Vol 587 (1) ◽  
pp. 1 ◽  
Author(s):  
Rodrigo C. Wanick ◽  
Inácio D.D. Silva-Neto
Keyword(s):  
Rio De Janeiro ◽  
Unique Combination ◽  
Constant Number ◽  
The South ◽  
Sepetiba Bay ◽  
Oral Region ◽  
Water And Sediment ◽  
Contractile Vacuoles ◽  
Janeiro State ◽  
Benthic Ciliates

During the period from 2001 to 2002, we examined samples of water and sediment from five stations in Sepetiba Bay, located in the south region of Rio de Janeiro state, Brazil. We identified 32 species of ciliate protists representing seven classes: Karyorelictea, Heterotrichea, Spirotrichea, Litostomatea, Phyllopharyngea, Protostomatea and Oligohymenophorea. Among the Spirotrichea, we discovered Pseudokeronopsis sepetibensis n. sp., characterized by a unique combination of three features: 3 contractile vacuoles, an inconspicuous mid-ventral row, and 4 5 frontoterminal cirri. It showed yellow-greenish coloration and elongated body outline (100 140 m x 20 26 m). On average, there were 44 adoral membranelles, 50 left marginal cirri, 48 right marginal cirri and 41 mid-ventral cirri disposed in a straight row past the level of the oral region. Other features include 4 frontoterminal cirri and a constant number of 3 transverse cirri; 8 frontal cirri (4 anterior and 4 posterior arranged as an atypical bicorone).

Investigating heavy metal bioaccumulation by macrofauna species from different feeding guilds from sandy beaches in Rio de Janeiro, Brazil

2018 ◽  
Vol 162 ◽  
pp. 655-662 ◽  
Author(s):  
Tatiana M.B. Cabrini ◽  
Carlos A.M. Barboza ◽  
Viviane B. Skinner ◽  
Rachel A. Hauser-Davis ◽  
Rafael C. Rocha ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Rio De Janeiro ◽  
Sandy Beaches ◽  
Feeding Guilds ◽  
Metal Bioaccumulation ◽  
Heavy Metal Bioaccumulation

scholarly journals ANTHROPOGENIC IMPACTS ON THE WESTERN SECTOR OF SEPETIBA BAY (SE DO BRAZIL) ACCESSED BY THE PB ISOTOPE COMPOSITION OF SURFACE SEDIMENTS

2019 ◽  
Vol 4 (3) ◽  
pp. 291-311 ◽  
Author(s):  
Shéron Joyce Díaz Morales ◽  
Josefa Varela Guerra ◽  
Márcia Andréia Da Silva Nunes ◽  
Maria Virgínia Alves Martins ◽  
Ariadne Marra de Souza ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Surface Sediments ◽  
Isotope Ratios ◽  
Pb Isotope ◽  
Sepetiba Bay ◽  
Isotope Signature ◽  
Western Sector ◽  
Internal Region ◽  
Se Brazil ◽  
Total Dissolution

This work analyses lead concentrations and isotope ratios 204Pb,206Pb,207Pb,208Pb, determined by leaching and total dissolution techniques from surface bottom sediment samples collected in the western sector of Sepetiba Bay, Rio de Janeiro (SE Brazil). The main aim of this work was to identify possible sources of Pb, particularly those related to anthropogenic activities for the study area located in the external region of this bay. Isotope ratios of 206Pb, 207Pb ranged from 1.160 to 1.259 for the total dissolution technique and from 1.175 to 1.188 for the leaching technique. The Pb isotope signature of the surface sediments of the western sector of Sepetiba Bay were compared with that obtained in other studies performed in Sepetiba Bay, including records of pre- and pos-industrial activity, and in other Brazilian regions. The isotope signature of the analyzed sediments in the western sector of Sepetiba Bay is similar to that obtained in previous works realized in the eastern and northeastern internal region of this bay which is under strong urbanization and industrial pressure. The results of Pb isotope signature obtained by the integrated use of total dissolution and leaching techniques allowed to trace the presence of sediments dredged from highly contaminated areas located in the eastern and north-eastern internal region of Sepetiba Bay probably as a consequence of dredging activities and natural processes of sediment dispersion. IMPACTOS ANTROPOGÊNICOS NO SETOR OESTE DA BAÍA DE SEPETIBA (SE DO BRASIL) ACESSADOS PELA COMPOSIÇÃO ISOTÓPICA DE PB DE SEDIMENTOS SUPERFÍCIAIS ResumoEste trabalho analisa as concentrações de chumbo (Pb) e isótopos de Pb (204Pb, 206Pb, 207Pb, 208Pb) determinados por técnicas de lixiviação e dissolução total de amostras de sedimentos de fundo, coletadas no setor oeste (região externa) da Baía de Sepetiba, no Rio de Janeiro (SE Brasil). O principal objetivo deste trabalho foi identificar possíveis fontes de Pb, principalmente aquelas relacionadas a atividades antropogênicas na área de estudo. A assinatura do isótopo Pb dos sedimentos analisados foi comparada com os dados obtidos em outros estudos realizados na Baía de Sepetiba e em outras regiões brasileiras, incluindo registros de atividade pré e pós-industrial. Na região externa da Baía de Sepetiba, os valores de 206Pb/207Pb variaram de 1.160 a 1.259 para a técnica de dissolução total e de 1.175 a 1.188 para a técnica de lixiviação. A assinatura isotópica dos sedimentos analisados é semelhante à obtida em trabalhos anteriores realizados na região interna leste e nordeste desta baía, que está sob forte influência da urbanização e pressão industrial. Os resultados da assinatura dos isótopos de Pb obtidos pelo uso integrado das técnicas de dissolução total e lixiviação permitiram rastrear, no setor oeste (região externa) da Baía de Sepetiba, a presença de sedimentos provinientes de áreas altamente contaminadas localizadas na região interna leste e nordeste da baía de Sepetiba, provavelmente como conseqüência das atividades de dragagem e processos naturais de dispersão de sedimentos. Palavras-chave: Isótopos de Pb. Geoquímica. Atividades antropogênicas. Fonte de sedimentos. Impacto de dragagem. Litoral.

scholarly journals THE PALEO-ENVIRONMENTAL SETTING OF SEPETIBA BAY, RIO DE JANEIRO, BRAZIL, IN THE LATE PLEISTOCENE: INTERPRETATIONS FROM HIGH-RESOLUTION SEISMIC STRATIGRAPHY

2015 ◽  
Vol 33 (4) ◽  
Author(s):  
Heloisa Vargas Borges ◽  
Charles A. Nittrouer
Keyword(s):  
High Resolution ◽  
Late Pleistocene ◽  
Seismic Data ◽  
Rio De Janeiro ◽  
Single Channel ◽  
Seismic Stratigraphy ◽  
Seismic Profiles ◽  
Sepetiba Bay ◽  
Environmental Setting ◽  
Geological Evolution

ABSTRACT. Single-channel high-resolution seismic profiles in Sepetiba Bay, Brazil, were collected to describe the recent geological evolution of this area. The seismic data showed... RESUMO. Perfis sísmicos de alta resolução da Baía de Sepetiba, Brasil, foram coletados com o objetivo de descrever a evolução geológica recente desta área. Os dados sísmicos...

scholarly journals Assessment of heavy metals in Egretta thula: case study: Coroa Grande mangrove, Sepetiba Bay, Rio de Janeiro, Brazil

2011 ◽  
Vol 71 (1) ◽  
pp. 77-82 ◽  
Author(s):  
AP Ferreira
Keyword(s):  
Rio De Janeiro ◽  
Geometric Mean ◽  
Linear Regression Analysis ◽  
Trophic Levels ◽  
Sepetiba Bay ◽  
Liver And Kidney ◽  
Mean Differences ◽  
Kidney Liver ◽  
Egretta Thula

This study focuses on metals analysis in kidney and liver tissues of Egretta thula which were collected prostrate or newly dead in Coroa Grande mangrove, Sepetiba Bay, Rio de Janeiro, Brazil, between March 2005 and October 2008. Kidney and liver were collected and analysed to evaluate heavy metal pollution. High values and widest range were detected for all metals in liver and kidney tissues. Geometric mean differences from metals concentrations for Zn, Cd, Ni, Pb, Cu, and Cr, respectively, were found in both organs. Results from linear regression analysis were non-significant in kidney (r = -0.79975, P = 0.10428), and in liver (r = -0.53193, P = 0.35618). With ANOVA analysis for metal accumulation differences (kidney*liver), at the 0.05 level, the results were significantly different (F = 33.17676, P = 0.00000; F = 12.47880, P = 0.00000). These results indicate that Sepetiba Bay shows worrying levels of metals in this study with E. thula, showing potential power of widespread biological and mutagenic adverse effects in trophic levels, and therefore, signalling risk to human health.

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